Slow write speed to Areca RAID
Of 10 identical machines, we now get very slow disk write speed on two machines. I don't think it is a hardware issue.
There must be a setting somewhere that is different, but I haven't found anything yet.
Any suggestions?
Good Machine
dd if=/dev/zero of=/mnt/das.h/testFile bs=100M count=1 oflag=dsync
1+0 records in
1+0 records out
104857600 bytes (105 MB) copied, 0.181045 s, **579 MB/s**
Slow Machine
dd if=/dev/zero of=/mnt/das.h/testFile bs=100M count=1 oflag=dsync
1+0 records in
1+0 records out
104857600 bytes (105 MB) copied, 20.3667 s, **5.1 MB/s**
Same hardware, same software.
Centos 6 32-bit
uname -a Linux 4.4.127-1.el6.elrepo.i686 #1 SMP Sun Apr 8 09:44:43 EDT 2018 i686 i686 i386 GNU/Linux
dmesg
Areca RAID Controller0: Model ARC-1882, F/W V1.52 2014-06-12
scsi host0: Areca SAS/SATA RAID Controller (RAID6 capable)
arcmsr version v1.40.0X.04-20171130
centos raid
asked 16 mins ago
DannyDanny
1787
add a comment |
Of 10 identical machines, we now get very slow disk write speed on two machines. I don't think it is a hardware issue.
There must be a setting somewhere that is different, but I haven't found anything yet.
Any suggestions?
Good Machine
dd if=/dev/zero of=/mnt/das.h/testFile bs=100M count=1 oflag=dsync
1+0 records in
1+0 records out
104857600 bytes (105 MB) copied, 0.181045 s, **579 MB/s**
Slow Machine
dd if=/dev/zero of=/mnt/das.h/testFile bs=100M count=1 oflag=dsync
1+0 records in
1+0 records out
104857600 bytes (105 MB) copied, 20.3667 s, **5.1 MB/s**
Same hardware, same software.
Centos 6 32-bit
uname -a Linux 4.4.127-1.el6.elrepo.i686 #1 SMP Sun Apr 8 09:44:43 EDT 2018 i686 i686 i386 GNU/Linux
dmesg
Areca RAID Controller0: Model ARC-1882, F/W V1.52 2014-06-12
scsi host0: Areca SAS/SATA RAID Controller (RAID6 capable)
arcmsr version v1.40.0X.04-20171130
centos raid
asked 16 mins ago
DannyDanny
1787
add a comment |
Of 10 identical machines, we now get very slow disk write speed on two machines. I don't think it is a hardware issue.
There must be a setting somewhere that is different, but I haven't found anything yet.
Any suggestions?
Good Machine
dd if=/dev/zero of=/mnt/das.h/testFile bs=100M count=1 oflag=dsync
1+0 records in
1+0 records out
104857600 bytes (105 MB) copied, 0.181045 s, **579 MB/s**
Slow Machine
dd if=/dev/zero of=/mnt/das.h/testFile bs=100M count=1 oflag=dsync
1+0 records in
1+0 records out
104857600 bytes (105 MB) copied, 20.3667 s, **5.1 MB/s**
Same hardware, same software.
Centos 6 32-bit
uname -a Linux 4.4.127-1.el6.elrepo.i686 #1 SMP Sun Apr 8 09:44:43 EDT 2018 i686 i686 i386 GNU/Linux
dmesg
Areca RAID Controller0: Model ARC-1882, F/W V1.52 2014-06-12
scsi host0: Areca SAS/SATA RAID Controller (RAID6 capable)
arcmsr version v1.40.0X.04-20171130
centos raid
asked 16 mins ago
DannyDanny
1787
Of 10 identical machines, we now get very slow disk write speed on two machines. I don't think it is a hardware issue.
There must be a setting somewhere that is different, but I haven't found anything yet.
Any suggestions?
Good Machine
dd if=/dev/zero of=/mnt/das.h/testFile bs=100M count=1 oflag=dsync
1+0 records in
1+0 records out
104857600 bytes (105 MB) copied, 0.181045 s, **579 MB/s**
Slow Machine
dd if=/dev/zero of=/mnt/das.h/testFile bs=100M count=1 oflag=dsync
1+0 records in
1+0 records out
104857600 bytes (105 MB) copied, 20.3667 s, **5.1 MB/s**
Same hardware, same software.
Centos 6 32-bit
uname -a Linux 4.4.127-1.el6.elrepo.i686 #1 SMP Sun Apr 8 09:44:43 EDT 2018 i686 i686 i386 GNU/Linux
dmesg
Areca RAID Controller0: Model ARC-1882, F/W V1.52 2014-06-12
scsi host0: Areca SAS/SATA RAID Controller (RAID6 capable)
arcmsr version v1.40.0X.04-20171130
centos raid
centos raid
asked 16 mins ago
DannyDanny
1787
asked 16 mins ago
DannyDanny
1787
asked 16 mins ago
DannyDanny
1787
asked 16 mins ago
DannyDanny
1787
asked 16 mins ago
DannyDanny
1787
1787
add a comment |
add a comment |
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